Oct. 02, 2009

Lester Brown: Plan B 4.0

Energy, food, climate, public health, poverty -- how do all these challenges interact with each other -- and what needs to be done to drive the planet towards sustainability? In this segment, Ira talks about global sustainability with Lester Brown, head of the Earth Policy Institute. Brown advocates a plan that he says would cut global carbon emissions 80 percent by the year 2020.